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Lower Windsor Township in York County, Pennsylvania — The American Northeast (Mid-Atlantic)
 

Margaretta Furnace

 
 
Margaretta Furnace Marker image. Click for full size.
Photographed by William Pope, May 4, 2025
1. Margaretta Furnace Marker
Inscription.
1823 - Henry Y. Slaymaker builds the Margaretta Furnace and names it after his wife.

1826 - Henry agrees to split the furnace 50-50 with his brother Stephen.

1828 - The furnace starts production, producing about 30 tons of iron ore per week. The Slaymakers also erected Woodstock forge nearby to turn their ore into finished products such as ten plate stoves.

1830-32 - Henry Slaymaker expands his operation and builds most of the other prominent buildings around like the stone mill, church, school, post office, general store, workers houses, etc.

1836 - Margaretta Furnace burns down, the blaze believed to be caused by either a spark from the works or lightning.

1837 - The furnace is rebuilt and upgraded with the newest technology to be more efficient. Scrip is also issued to the workers for use at the company store.

1843 - Henry Slaymaker declares bankruptcy and the furnace property goes up for sheriff sale.

1854 - Last recorded blast of the Margaretta Furnace; the mill continued operation by the George Himes family.

1897 - Benjamin Mittel buys the stone mill and the surrounding 52 acres of land. He ran the mill until his death in 1927.

1946 - The stone mill was demolished.

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Portrait of the furnace operation, including the mill and the run.

Photograph of the mill, taken during the 1920's.

Margaretta Furnace Scrip.
From the collection of the York County History Center, York, PA

Mittel's Mill

Margaretta Furnace was the leading producer of pig iron, kettles, skillets, firebacks, and ten plate stoves in the area. To the left is an image of a ten plate stove.

 
Erected by Eagle Scout project by Joshua Mundis from Troop 26, benefiting the Lower Windsor Area Historical Society.
 
Topics. This historical marker is listed in this topic list: Industry & Commerce. A significant historical year for this entry is 1823.
 
Location. 39° 57.718′ N, 76° 32.128′ W. Marker is in Windsor, Pennsylvania, in York County. It is in Lower Windsor Township. It is at the intersection of Willow Creek Road and Snyder Road, on the right when traveling south on Willow Creek Road. Touch for map. Marker is at or near this postal address: 1557 Snyder Road, Windsor PA 17366, United States of America. Touch for directions.

Regionally, this marker is in South-Central Pennsylvania, specifically in Pennsylvania Dutch Country, in the Susquehanna Valley, and in Greater Harrisburg. It is also in the American Northeast and in the Mid-Atlantic. Globally, it is in North America, the Western Hemisphere, the Western World, and the Anglosphere. Historically, it finds itself in what was once the Haudenosaunee (Iroquois) Confederacy and also one of the original Thirteen Colonies.

Other nearby markers. At least 8 other markers are within 3 miles of this marker, measured as the crow flies: Veterans Memorial (approx. 1.1 miles away); East Prospect (approx. 1.1 miles away); Craley (approx. 1½ miles away); Honor Roll
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(approx. 1.6 miles away); Native Lands Trailhead (approx. 2.3 miles away); The John & Kathryn Zimmerman Center for Heritage (approx. 2.3 miles away); Thomas Cresap and the Border War (approx. 2.3 miles away); Cresap's Fort (approx. 2.3 miles away).
 
 
Credits. This page was last revised on November 4, 2025. It was originally submitted on October 18, 2025, by William Pope of Marietta, Pennsylvania. This page has been viewed 139 times since then and 108 times this year. Photo   1. submitted on October 18, 2025, by William Pope of Marietta, Pennsylvania. • Andrew Ruppenstein was the editor who published this page.
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Jun. 6, 2026